[完善] 正确计算可视区域宽度

src/app/ui/collection-tools/collection-tools.component.ts

@@ -929,7 +929,9 @@ export class CollectionToolsComponent implements OnInit {
   backGroundScale () {
     let that = this
     let dad = document.querySelector('.functionalDomainContent').clientWidth
-    let imgWidth = dad - 460 //可是区域内 宽度
+    let left = document.querySelector('.functionalDomainLeft').clientWidth
+    let right = document.querySelector('.functionalDomainRight').clientWidth
+    let imgWidth = dad - left - right//可是区域内 宽度
     let img = new Image()
     img.src = this.selectingSitePlan.imageUrl;  
     img.onload = function(){